Answer:
What measures out time until in time all is smashed to it?
A precious stone, as clear as diamond. Seek it out while the sun's near the horizon. Though you can walk on water with its power, try to keep it, and it'll vanish in an hour.
What has a bell but isn't a church. Is full of air but is not a balloon?
Thirty white horses on a red hill, First they champ, Then they stamp, Then they stand still.
You seek it out, when your hunger is ripe. It sits on four legs, and smokes a pipe.
This food is a tortilla filled with cheese and sometimes chicken before being heated or cooked.